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Title: Single crystal metal photocathodes: Benchmarking performance against Ab initio theory

Abstract

The results generated by this short-term research project have contributed significantly to our overall understanding and practical implementation of metal photocathodes. First, the research work has verified the direct connection between the energy-momentum dispersion of the emitting bulk band states and the mean transverse energy and quantum efficiency of the electrons emitted from solid-state photocathodes. Second, and more importantly, the work has shown that the density of the recipient vacuum states must be included in any description of the emission properties of photocathodes. Third, amongst the primary crystal faces of Cu, only Cu(100) is found to be a good single-crystal photocathode material in the 260-270nm wavelength range, which includes the fourth harmonic of Nd:YAG lasers. Finally, measurements on Mg(0001) indicate that UV transparent oxide surface layers can affect the mean transverse energy of photo-emitted electrons.

Authors:
 [1];  [2];  [3];  [2]
  1. Univ. of Illinois, Chicago, IL (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
Univ. of Illinois, Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
Contributing Org.:
Lawrence Berkeley National Laboratory (LBNL)
OSTI Identifier:
1477000
Report Number(s):
DOE-UIC-SC-0017621
DOE Contract Number:  
SC0017621
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Photocathodes; Density functional theory; Vacuum states

Citation Formats

Schroeder, Walter Andreas, Padmore, Howard, Vecchione, Theodore, and Karkare, Siddharth. Single crystal metal photocathodes: Benchmarking performance against Ab initio theory. United States: N. p., 2018. Web. doi:10.2172/1477000.
Schroeder, Walter Andreas, Padmore, Howard, Vecchione, Theodore, & Karkare, Siddharth. Single crystal metal photocathodes: Benchmarking performance against Ab initio theory. United States. doi:10.2172/1477000.
Schroeder, Walter Andreas, Padmore, Howard, Vecchione, Theodore, and Karkare, Siddharth. Mon . "Single crystal metal photocathodes: Benchmarking performance against Ab initio theory". United States. doi:10.2172/1477000. https://www.osti.gov/servlets/purl/1477000.
@article{osti_1477000,
title = {Single crystal metal photocathodes: Benchmarking performance against Ab initio theory},
author = {Schroeder, Walter Andreas and Padmore, Howard and Vecchione, Theodore and Karkare, Siddharth},
abstractNote = {The results generated by this short-term research project have contributed significantly to our overall understanding and practical implementation of metal photocathodes. First, the research work has verified the direct connection between the energy-momentum dispersion of the emitting bulk band states and the mean transverse energy and quantum efficiency of the electrons emitted from solid-state photocathodes. Second, and more importantly, the work has shown that the density of the recipient vacuum states must be included in any description of the emission properties of photocathodes. Third, amongst the primary crystal faces of Cu, only Cu(100) is found to be a good single-crystal photocathode material in the 260-270nm wavelength range, which includes the fourth harmonic of Nd:YAG lasers. Finally, measurements on Mg(0001) indicate that UV transparent oxide surface layers can affect the mean transverse energy of photo-emitted electrons.},
doi = {10.2172/1477000},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}